Photochromic articles and methods for making them

Details Photochromic articles and methods for making them Photochromic articles and methods for making them

B - Operations, Transporting

29

D

B29D 11/00 (2006.01) B29C 43/00 (2006.01) B32B 33/00 (2006.01) G02B 5/23 (2006.01)

Patent

CA 2430593

The present invention is directed to photochromic parts, objects, and articles and to methods for preparing them. The articles of the inventions have at least two layers, at least one of which is loaded with a photochromic dye. The layers are made of either the same or different materials. At least one of the layers is formed form a semi-solid polymerizable material, which comprises a reactive plasticizer and, optionally, a dead polymer, and, when used as the photochromic layer, further comprises a photochromic dye. The remaining layer(s) may be formed from liquid resins or additional semi-solid polymerizable materials.

L'invention concerne des pièces, des objets et des articles photochromes ainsi que leurs procédés de préparation. Ces articles présentent au moins deux couches, dont au moins une est chargée d'une teinture photochrome. Les couches sont faites d'un même matériau ou de matériaux différents. Au moins une des couches est faite d'un matériau semi-solide polymérisable, qui renferme un plastifiant réactif et, éventuellement, un polymère inerte, et, si elle est utilisée comme couche photochrome, une teinture photochrome. La(les) couche(s) restante(s) peuvent être produites à partir de résines ou de matériaux semi-solides polymérisables additionnels.

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